How old is too old not to invite significant others to wedding? My younger brother is 17 years old and is throwing a fit because well I didn't think to invite his girl friend. I know that at 17 dating someone for 6 months or so is FOREVER but in big boy and girl land 6 months is not a serious relationship. Not to mention we'd have to figure out where she'd be sleeping and who's going to be keeping an eye on them both (if you know what I mean) Not only that but it's my freakin wedding weekend not little brother and co.'s weekend getway all expenses paid by me. I Know I'm sounds a bit bridezilla-ish so please correct me if I'm being out of line. Now, other situation at hand is that My sister (and a bridesmaid) has started dating a new boyfriend who she's not even serious about (her words not mine) and now she wants to bring him too. I don't really mind because she was supposed to bring her old boyfriend and now we have space for a +1 on the list but I don't know... I don't like him that much and really don't want ot deal with it. Problem is I know I can't really tell her not to bring her new boyfriend even if he is the flavour of the week. Then again how do I tell her she can bring him and have my little brothers girlfriend out? Technically she's been around longer. drama.